Center baseline allows characters and glyphs to stay correctly aligned, even when they have additional ruby characters that are positioned preserving element’s line height

With those updates, content creators can tap into Internet Explorer powerful vertical layout features in their Web sites, Web applications and modern Windows apps. We look forward your feedback through Connect.

Please, fix the demo to use the standardized writing-mode values (vertical-rl) in addition to the proprietary values supported by Internet Explorer (tb-rl), including prefixes for other browsers as necessary in order to have a true comparison when running the demos under various browsers.

W3C has approved XPath 3 now. Microsoft hasn't brought even the old XPath 2 support in any of their products (SharePoint, Internet Explorer, .NET).

Is this the "commitment to standards" we were promised lately? Let alone the MathML which is 15 years old standard. According to Scott Hanselman, its only supported by Firefox so its ok! No sir, its not OK. Microsoft IE was developed before Mozilla foundation was formed or Google Corporation was established. So its not a big ask to expect IE to take the lead in Standards support..

C99 is fully supported in MSVC now, please bring those established standards in Internet Explorer (at least!). If you open source certain feature branch, I am ready to contribute, so are many others I am sure..

@NumbStill, @matarillo – this is a snapshot of our work in progress in this area and we've developed the demo to show recent Internet Explorer improvements. In one of the next versions we hope to enable current Writing modes standards updates.

Vertical layout and writing modes have many areas where browsers have different implementations in positioning, centering and alignment. We hope to improve interoperability in this area through continued CSS working group participation with other vendors.

browserVersion suddenly is replaced with browserVerison ("i" and "s" are permutated) and browserVerison has everything to do with browser sniffing of user agent string and nothing to do with feature detection (albeit document.documentMode is IE9-and-higher-specific).